Question

Which of the following muscles is the prime mover for inhalation? A. internal intercostals B. external intercostals C. diaphragm D. stylohyoid E. hyoglossus The most superficial muscle of the abdominal wall is the A. transverse abdominal. B. internal oblique. C external oblique. D. latissimus dorsi. E. pectoralis minor Tendinous intersections divide the ______ into segments externally visible on the abdomen of a well muscled person. A. vastus lateralis B. serratus anterior C. rectus abdominis D. quadriceps femoris E. transverse abdominal

Answer 1

12. A

Explanation: A semi-permeable membrane contains transmembrane proteins named as channels and carriers. These proteins allow the transport of only certain molecules through the membrane.

13. A

Explanation: The carrier protein carries glucose along with sodium. Such a protein is called as symport; and the transport in which both molecules move together is called as cotransport.

14. B

Explanation: In a hypotonic solution, the concentration of solutes is less than the concentration of solvent. RBC membrane is semi-permeable. It will allow solvent molecules to move from a region of higher concentration (hypotonic solution) to a region of lower concentration (cell cytoplasm). So, the cell will swell.

15. C

Explanation:

Diaphragm is the prime mover of inhalation. It separates the thorax from the abdomen. When we breathe in air, then it contracts. This increases the thorax volume so that inhaled air can come inside.