Rate of heart beat is determined by
Purkinje Fibres
Papillary muscles
SA-node
AV-node
C.
SA-node
The contraction of heart depends on small cluster of specialised muscle cells which are embedded in the upper wall of the right atrium. This cluster of cells is called the sino-atrial node (SA-node). It automatically and rhythmically sends out impulses that initiate each heart beat.
The junction between the axon of one neuron and the dendrite of the next is called
Junction point
A synapse
A joint
Constant bridge
Which cranial nerve has the highest number of branches?
Facial nerve
Trigeminal
Vagus nerve
None of these
Chondrichthyes is characterised by
Placoid scale
Ventral mouth
Ctenoid scale and ventral mouth
Placoid scale and ventral mouth
The problem due to Rh factor arises when the blood of two (Rh and Rh) mixup
During Pregnancy
Through transfusion
In a test tube
Both (a) and (b)
The stratified epithelium is found in
Seminiferous tubule
Fallopian tube
Nasal cavity
Kidney tubules
