Question

question 7
because of ______, hands, feet, and noses get cold before the rest of the body does.
a vasoconcentration
b vasoconstriction
c vasodilation
d ph regulation
e insulin
question 8
an organ is composed of different ______ types that work together to carry out a common function.
a organelles
b tissues
c organs

Explanation:

• Question 7: Vasoconstriction is the narrowing of blood vessels in extremities (hands, feet, noses) to conserve core body heat, reducing blood flow and making these areas cold first. Vasoconcentration, vasodilation, pH regulation, and insulin are unrelated to this mechanism.
• Question 8: Organs are structural units made of different tissues (e.g., muscle, epithelial) that collaborate to perform specific functions. Organelles are cell components, and organs make up organ systems, so tissues are the correct answer.

Answer:

Question 7: B. vasoconstriction
Question 8: B. tissues