Question

question 31
0.25 pts
which of the following contains intercalated disks?
smooth muscle
striated muscle
cardiac muscle
blood
question 32
0.25 pts
besides water, extracellular matrix contains
proteins and lipids.
lipids and carbohydrates.
carbohydrates and proteoglycans.
proteins and proteoglycans.
question 33
0.25 pts
the connective tissue membranes that line the spaces between bones and joints are called ______ membranes.
mucous
cutaneous
serous
synovial

Explanation:

Question 31

Intercalated disks are unique to cardiac muscle, connecting cardiac muscle cells and enabling synchronized contraction. Smooth muscle has no intercalated disks, striated muscle (skeletal) also lacks them, and blood is not muscle tissue.

The extracellular matrix (ECM) of connective tissue, besides water, contains proteins (like collagen) and proteoglycans (which have a protein core with glycosaminoglycan chains). Lipids are not a major ECM component, and options with carbohydrates/proteoglycans or incorrect combinations are ruled out.

Synovial membranes line joint cavities (spaces between bones and joints), producing synovial fluid. Mucous membranes line body cavities open to the exterior, cutaneous is the skin, and serous membranes line closed body cavities (like pleural, peritoneal).

Answer:

C. cardiac muscle

Question 32