Question 1

What correctly describes how an endotherm would respond to an increase in temperature?

  A  

dilation of arterioles near the surface of the skin

  B  

erector muscles contract, causing hairs to stand up

  C  

rapid contractions of skeletal muscles

  D  

sweat glands release less sweat

0

/

1

Question 2

What type of cells detect stimuli in the body?

  A  

effector cells

  B  

receptor cells

  C  

nerve cells

  D  

muscle cells

0

/

1

Question 3

What do effectors do in response to stimuli?

  A  

receive and process information

  B  

bring about a response

  C  

act as a communication system

  D  

detect changes in the environment

0

/

1

Question 4

What is the primary purpose of homeostasis?

  A  

to communicate between different cells

  B  

to detect specific stimuli

  C  

to maintain a constant internal environment

  D  

to generate metabolic reactions

0

/

1

Question 5

What type of feedback mechanism restores normal levels after a change?

  A  

positive feedback

  B  

negative feedback

  C  

neutral feedback

  D  

static feedback

0

/

1

Question 6

Why isn't positive feedback involved in maintaining homeostasis in humans?

  A  

it cannot detect changes

  B  

it only functions in ectotherms

  C  

it reduces the effectiveness of effectors

  D  

it amplifies rather than stabilises changes

0

/

1

Question 7

How do hormones reach their target cells in the body?

  A  

via the circulatory system

  B  

through the nervous system

  C  

through passive diffusion

  D  

by direct cell-to-cell contact

0

/

1

Question 8

Which glands secrete hormones directly into the bloodstream?

  A  

exocrine glands

  B  

endocrine glands

  C  

salivary glands

  D  

sweat glands

0

/

1

Question 9

In the hormonal system, what do second messengers do?

  A  

carry the chemical message throughout the body

  B  

act as the initial stimulus

  C  

directly convert stimuli into responses

  D  

activate a cascade of reactions inside a cell

0

/

1

Question 10

How does vasodilation help mammals reduce their body temperature?

  A  

more blood flows through capillaries in the dermis so less heat is radiated

  B  

less blood flows through capillaries in the dermis so more heat is radiated

  C  

more blood flows through capillaries in the dermis so more heat is radiated

  D  

less blood flows through capillaries so less heat is radiated

0

/

1

Question 11

Which statement about ectotherms and endotherms is correct?

  A  

ectotherms can control their body temperature internally while endotherms cannot

  B  

both ectotherms and endotherms control their body temperature by only behaviour

  C  

the internal temperature of endotherms depends on their surroundings while ectotherms are less affected

  D  

ectotherms have a variable metabolic rate while endotherms have a constantly high rate

0

/

1