Which is not a primary component of a typical animal cell?
A) Plasma membrane
B) Cell wall
C) Cytoplasm
D) Nucleus
Answer: B
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The reason for the reddish tint seen in lightly pigmented skin is the molecule formed by the combination of oxygen and melanin
Indicate whether this statement is true or false.
Answer the following statements true (T) or false (F)
1. Osmotic pressure is created by the presence in a fluid of small diffusible molecules that easily move through the capillary membrane. 2. The cerebral arterial circle (circle of Willis) is an arterial anastomosis. 3. The outermost layer of a blood vessel is the tunica intima. 4. The thick-walled arteries close to the heart are called muscular arteries. 5. Hypotension is generally considered systolic blood pressure that is below 100 mm Hg.
Cells have a membrane potential, a slight excess of positive charges lined up along the inside of the membrane and a slight excess of negative charges on the outside
a. True b. False Indicate whether the statement is true or false
Which statement correctly compares passive and active transport?
A. Passive transport moves materials across the cell membrane without the use of energy while active transport moves materials across the cell membrane against the concentration gradient without the use of energy. B. Passive transport moves materials across the cell membrane with the use of energy while active transport moves materials across the cell membrane against the concentration gradient with the use of energy. C. Passive transport moves materials across the cell membrane with the use of energy while active transport moves materials across the cell membrane against the concentration gradient without the use of energy. D. Passive transport moves materials across the cell membrane without the use of energy while active transport moves materials across the cell membrane against the concentration gradient with the use of energy.