1. When calcium diffuse into the cytosol, it binds to________. This complex is involved in the production of nitric oxide (no) the activating the enzyme ________. Similar to cAMP, the second cGMP is produced by the enzyme ______________. Eventulally, striated and smooth muscle tissue __________.

a. calipain, calmodulin(CaM), guanylye cyclase (GC), dilate
b. calmodulin(CaM), nitric oxide synthase(NOS,)guanylye cyclase (GC), dilate
c. calmodulin(CaM),nitric oxide synthase(NOS,)guanylye cyclase (GC), constricted
d. PKC, oxide synthase(NOS), adenylyl cyclase (AC)

I think the right answer is b, not sure please check

To answer this question, we need to understand the role of calcium in the production of nitric oxide (NO) and the enzymes involved.

1. Calcium binds to calmodulin (CaM) when it diffuses into the cytosol. Calmodulin is a calcium-binding protein that acts as a messenger to transmit the calcium signal to various cellular processes.

2. The calcium-CaM complex activates the enzyme called nitric oxide synthase (NOS). Nitric oxide synthase is responsible for producing nitric oxide (NO) from the amino acid L-arginine.

3. Similar to cAMP, the second messenger cyclic GMP (cGMP) is produced by the enzyme guanylyl cyclase (GC). Once nitric oxide (NO) is produced by NOS, it activates guanylyl cyclase, leading to the production of cGMP.

4. Ultimately, the effects of increased cGMP levels can lead to the relaxation and dilation of striated and smooth muscle tissue.

Based on this information, the correct answer is b. Calmodulin (CaM) binds to calcium, nitric oxide synthase (NOS) is activated to produce nitric oxide (NO), and guanylyl cyclase (GC) produces cyclic GMP (cGMP), which ultimately leads to muscle dilation.