Question

1) Antibodies are what type of plasma protein?

fibrinogen

metalloprotein

steroid-binding protein

immunoglobulin

apolipoprotein

2) Which of the following would not increase heart rate?

faster depolarization of the pacemaker potential

increased sympathetic stimulation of SA node

beta blocking drugs

decreased parasympathetic stimulation of nodal fibers

increased levels of epinephrine

3)The endocardium consists of this type of tissue.

Group of answer choices

cardiac muscle

dense irregular connective tissue

simple squamous epithelium

stratified squamous epithelium

reticular connective tissue

Answer 1

Answer

1. Option D) Immunoglobulin

• Antibodies are immunoglobulin protieins that binds to foreign antigens.
• They are produced by B lymphocytes.
• They prevent infection or fight pathogens to treat infection.

2. Option C) Beta blocking drugs

• Beta blockers are drugs that blood adrenergic chemical messengers called epinephrine and norepinephrine.
• It decreases heart rate.

3. Option C) Simple squamous epithelium

• Simple squamous epithelium is made up of tightly packed cells.
• It is very thin and contains no extracellular matrix.
• Endocardium is innermost layer of of the heart made up of simple squamous epithelium.