Homeostasis

In which regions of the body are receptors for blood temperature found?

Feb/March 2017

During exercise, receptors sense a change in the blood and make the breathing rate rise. What change do the receptors sense, and where in the body are they located?

Feb/March 2018

The table lists some responses that happen in humans when body temperature changes. Which row gives the responses that occur when body temperature rises above normal?

Feb/March 2020

During physical activity, what causes the brain to increase the breathing rate?

Feb/March 2020

A person's internal body temperature was measured, and the findings are shown in Fig. 2.1.

Feb/March 2025

How will strenuous exercise affect the volume of water lost via the skin and the kidneys?

May/June 2016

Someone has remained in a room at $35^{\circ}\text{C}$ for $30$ minutes. What effect would then drinking several glasses of iced water have?

May/June 2016

Fig. 3.1 illustrates a cross-section of the skin.

May/June 2016

Fig. 6.1 illustrates the changes in blood glucose concentration.

May/June 2016

Which response takes place when body temperature increases?

May/June 2017

Which process used to keep body temperature stable depends on muscle action?

May/June 2018

State the name of cell P.

May/June 2018

As our body warms up and the temperature of our blood goes up, one method of cooling down is to sweat. Which structure detects the increase in blood temperature?

May/June 2019

How are muscle contraction, protein synthesis and the maintenance of a constant body temperature connected?

May/June 2021

What relationship exists between muscle contraction, protein synthesis and the maintenance of a constant body temperature?

May/June 2021

A person's skin appears redder in a warm surroundings than in a cooler surroundings. Which explanation is correct?

May/June 2021

Which statement about how human body temperature is regulated is correct?

May/June 2021

An individual produced $1.75\,\text{dm}^3$ of urine on a cool day. What would happen to the volume and concentration of the urine on a hot day, assuming the fluid intake stays the same as on the cool day?

May/June 2022

Which organ senses changes in the body’s internal temperature and coordinates the response?

May/June 2022

In which part of the body are the receptors that detect blood temperature located?

May/June 2022

A scientist carried out an investigation into how drinking iced water affects skin temperature. They consumed a large volume of iced water and recorded their skin temperature. The results are displayed on the graph of skin temperature ($^\circ\text{C}$) against time after drinking iced water (minutes). Which explanation for the change in skin temperature during the first $10$ minutes is correct?

May/June 2022

Negative feedback regulates the concentration of glucose in the blood. If blood glucose concentration drops too low, the .....1..... produces the hormone .....2...... This hormone makes cells break down .....3..... into glucose, and the glucose is released into the blood. Which words are correct for gaps 1, 2 and 3?

May/June 2022

Define the term homeostasis.

May/June 2022

What term refers to the way the body keeps its internal temperature constant on a hot day?

May/June 2024

What would cause blood glucose concentration to fall?

May/June 2024

The following changes take place in the human body during exercise. 1 breathing rate rises 2 the respiration rate rises 3 nerve impulses are sent from the brain to the intercostal muscles and diaphragm 4 receptors in the brain detect a higher concentration of carbon dioxide in the blood What is the correct sequence for these changes?

May/June 2024

State the term that describes keeping the internal environment constant.

May/June 2024

State the temperature interval of the external environment shown in Fig. 2.1.

May/June 2024

What is one response of the human body when it becomes overheated?

May/June 2025

Complete the statements about the control of blood glucose concentration. After a person eats a meal containing carbohydrates, blood glucose concentration rises. As a result, the [BLANK] releases insulin. Insulin makes the [BLANK] remove glucose from the blood and convert it into [BLANK]. Regulation of blood glucose concentration is an example of [BLANK].

May/June 2025

State two other routes by which water leaves the body.

Oct/Nov 2016

What is the main function of sweating?

Oct/Nov 2017

The diagram shows a person sweating in hot weather. What role do sweat glands have in the process of sweating?

Oct/Nov 2017

What is the primary function of sweating?

Oct/Nov 2017

The diagram depicts a person sweating in hot weather. What role do sweat glands play in the process of sweating?

Oct/Nov 2017

What is the primary function of sweating?

Oct/Nov 2017

The diagram depicts a person perspiring in hot weather. What role do sweat glands have in the process of sweating?

Oct/Nov 2017

What is the primary purpose of sweating?

Oct/Nov 2017

The diagram depicts a person perspiring in hot weather. What role do sweat glands have in the process of sweating?

Oct/Nov 2017

Which function of sweating is the most important?

Oct/Nov 2017

The diagram depicts a person sweating in hot weather. What role do sweat glands play in the process of sweating?

Oct/Nov 2017

What is the main function of sweating?

Oct/Nov 2017

The diagram depicts a person sweating in hot weather. What role do sweat glands play in the process of sweating?

Oct/Nov 2017

Glucose moves from the small intestine into the blood. Fig. 6.1 illustrates the human circulatory system and the route followed by molecules, such as glucose, as they travel in the blood.

Oct/Nov 2017

Fig. 6.1 presents a flow chart showing several of the events involved in keeping body temperature constant. The chart shows: body temperature rises; temperature receptors detect a stimulus; X; the central nervous system receives an impulse and passes the impulse on; Y; sweat glands respond; blood vessels respond; hair erector muscles respond; body temperature falls to the set level.

Oct/Nov 2017

A person does strenuous exercise without taking in any water. What would be the concentration and volume of that person’s urine straight after exercise?

Oct/Nov 2018

A person drinks a glass of chilled water and the amount of sweat they release falls. Which characteristic of living organisms does this show?

Oct/Nov 2018

A person engages in vigorous exercise without drinking any water. What would happen to the concentration and volume of the person’s urine immediately after exercise?

Oct/Nov 2018

In a mammal, body temperature is controlled by negative feedback. As a consequence of negative feedback, what occurs in the mammal’s body when the temperature of the external environment falls?

Oct/Nov 2018

Which process involves releasing heat so that body temperature remains constant?

Oct/Nov 2019

A scientist studied the way the human body responds to temperature. Which row gives the predicted responses at environmental temperatures of $0^\circ\text{C}$ and $40^\circ\text{C}$?

Oct/Nov 2021

In what way does the body raise blood glucose concentration?

Oct/Nov 2021

Which process is a response by the body that forms part of a negative feedback mechanism?

Oct/Nov 2021

What occurs when a person's blood glucose concentration is low?

Oct/Nov 2021

State the word that describes keeping the internal environment constant.

Oct/Nov 2021

What is the term for the response to a low concentration of glucose in the blood?

Oct/Nov 2022

What is the body’s reaction to a low concentration of glucose in the blood?

Oct/Nov 2022

What is the body's response when the concentration of glucose in the blood is low?

Oct/Nov 2022

During exercise, receptors sense a change in the blood and make the breathing rate rise. What change do these receptors sense, and where in the body are they located?

Oct/Nov 2023

Complete the sentences on control of body temperature. The human body keeps its internal temperature constant. This is an example of [BLANK]. If the temperature changes from the set point, [BLANK] returns it to the set point.

Oct/Nov 2023

State the names of fluid A and fluid C shown in Fig. 3.1.

Oct/Nov 2024

What actions can stop a mammal’s internal body temperature from dropping too low?

Oct/Nov 2025