BIOLOGY PAPER 2 FOUNDATION QUESTIONS AND CORRECT,VERIFIED ANSWERS|100%
PASS|GRADE A+ ASSURED
Homeostasis -CORRECT ANSWER-The maintenance of internal conditions to keep them at an
optimum
What internal conditions are controlled as part of homeostasis? (3) -CORRECT ANSWER-
Blood glucose (sugar)
Water levels
Temperature
Why is it important to maintain an optimum temperature? -CORRECT ANSWER-For optimum
enzyme activity in the body
What do all control systems include? -CORRECT ANSWER-Receptors, coordination centres
and effectors
What is the function of the human nervous system? -CORRECT ANSWER-Enables humans to
react to their surroundings and to coordinate their behaviour
What is the pathway of a nervous reflex? -CORRECT ANSWER-Stimulus --> receptor -->
sensory neurone --> relay neurone --> motor neurone --> effector --> response
What is a stimulus? -CORRECT ANSWER-A change in the environment
, What is an effector? -CORRECT ANSWER-Muscles or glands that bring about a response
Why are reflex actions important? -CORRECT ANSWER-Reflex actions aid survival by
preventing harm to the body.
Why does the reflex arc not go via the brain? -CORRECT ANSWER-As it does not require a
decision to be made as the reflex is there to prevent harm
and
It is a shorter and therefore quicker path to skip out the brain
What is a synapse? -CORRECT ANSWER-Junction between two neurons. Neurons do not
touch.
What is the central nervous system (CNS)? -CORRECT ANSWER-Brain and spinal cord
What is the peripheral nervous system (PNS)? -CORRECT ANSWER-This is the part of the
nervous system outside the CNS. These are the nerves that extend from the brain and spinal
cord
What is the difference between nervous responses and hormonal responses? -CORRECT
ANSWER-Nervous responses faster
Hormonal responses longer lasting
Endocrine system -CORRECT ANSWER-Consists of glands that control many of the body's
activities by producing hormones.
Where is the pituitary gland? -CORRECT ANSWER-In the brain
Where is the thyroid gland? -CORRECT ANSWER-In the neck
PASS|GRADE A+ ASSURED
Homeostasis -CORRECT ANSWER-The maintenance of internal conditions to keep them at an
optimum
What internal conditions are controlled as part of homeostasis? (3) -CORRECT ANSWER-
Blood glucose (sugar)
Water levels
Temperature
Why is it important to maintain an optimum temperature? -CORRECT ANSWER-For optimum
enzyme activity in the body
What do all control systems include? -CORRECT ANSWER-Receptors, coordination centres
and effectors
What is the function of the human nervous system? -CORRECT ANSWER-Enables humans to
react to their surroundings and to coordinate their behaviour
What is the pathway of a nervous reflex? -CORRECT ANSWER-Stimulus --> receptor -->
sensory neurone --> relay neurone --> motor neurone --> effector --> response
What is a stimulus? -CORRECT ANSWER-A change in the environment
, What is an effector? -CORRECT ANSWER-Muscles or glands that bring about a response
Why are reflex actions important? -CORRECT ANSWER-Reflex actions aid survival by
preventing harm to the body.
Why does the reflex arc not go via the brain? -CORRECT ANSWER-As it does not require a
decision to be made as the reflex is there to prevent harm
and
It is a shorter and therefore quicker path to skip out the brain
What is a synapse? -CORRECT ANSWER-Junction between two neurons. Neurons do not
touch.
What is the central nervous system (CNS)? -CORRECT ANSWER-Brain and spinal cord
What is the peripheral nervous system (PNS)? -CORRECT ANSWER-This is the part of the
nervous system outside the CNS. These are the nerves that extend from the brain and spinal
cord
What is the difference between nervous responses and hormonal responses? -CORRECT
ANSWER-Nervous responses faster
Hormonal responses longer lasting
Endocrine system -CORRECT ANSWER-Consists of glands that control many of the body's
activities by producing hormones.
Where is the pituitary gland? -CORRECT ANSWER-In the brain
Where is the thyroid gland? -CORRECT ANSWER-In the neck
