These questions consist of two statements:
• an assertion, and
• a reason.
You must first determine whether each statement is TRUE or FALSE.
• If both statements are true, you must next determine whether the reason correctly explains the assertion. The answer will be option 1 or option 2.
• If one statement is true and the other is false then the answer is option 3 or option 4, depending on which of the statements is correct.
• If both statements are false, then the answer is option 5.
There is one option for each possible outcome.
A = the Assertion
Skin forms a barrier between the internal environment of the body and the external environment
R = the Reason
Skin is a tissue layer that covers the body surface
A = the Assertion
The stratum basale of the epidermis continually produces new cells by mitosis (cell division)
R = the Reason
The epidermis contains cells that become filled with keratin
A = the Assertion
Cyanosis is discolouration of skin and mucous membranes due to hypoxia
R = the Reason
Melanocytes are cells in skin that produce the pigment melanin
A = the Assertion
Vasodilation of arterioles in the dermis is an important effector response to a cold stimulus
R = the Reason
When blood supply to skin capillary loops is increased, heat loss through the skin is minimised
A = the Assertion
Skin plays an essential role in homeostasis of body temperature (thermoregulation)
R = the Reason
Blood vessels in the dermis dilate in response to injury, making skin feel warm
