Daily NEET MCQ- March 28, 2022 - NEET MCQ

The bones of the skeletal system are divided into two parts-the axial skeleton and the appendicular skeleton. The axial skeleton consists of 80 bones. These bones are present along the main axis of the body.

The bones of the skeletal system are divided into two parts- the axial skeleton and the appendicular skeleton. The skull, sternum, vertebral column and ribs make up the axial skeleton of the body.

The skull is made up of 22 bones. These bones are classified into two categories- the cranial bones and the facial bones. There are 8 cranial bones and 22 facial bones. The facial bones form the front part of the skull.

The hyoid bone is a U – shaped bone which is located at the base of the buccal cavity. It is a single bone and is included along with the bones of the skull. The skull possesses a total of 22 bones.

Humans possess two occipital condyles. Hence, humans have a dicondylic skull. The function of the occipital condyles is to articulate the skull region with the superior region of the vertebral column.

The atria are the two upper chambers of the heart. The walls of the atria secrete a hormone known as atrial natriuretic factor or ANF. Its function is to reduce blood pressure to maintain homeostasis.

ANF or atrial natriuretic factor is secreted by the heart. It is secreted by the walls of the atria. PRL is secreted by the anterior pituitary gland, MSH by the pars intermedia and CCK by the GI tract.

Beat frequency is equal to the difference between frequencies of interfering waves. In this case, beat frequency
= 6-2 = 4Hz.

As the initial beat frequency is 2Hz, the 2nd tuning fork can have a frequency of 98Hz or 102Hz. When wax is applied to the second tuning fork its frequency should decrease. On doing so the beat frequency has also increased, so the initial value of the frequency of the 2nd tuning fork must be lower than that of the first tuning fork.

Beryllium’s and aluminium action with water is the same, they do not decompose with water or in the presence of water even at hundred degrees centigrade. This is probably due to their less electropositive character that is they are electronegative in nature.