STD 12 - 3. reproductive health — NEET STD 11 Science — Question

Ovulation does not occur during pregnancy in the human female because

Which of the given option is correct about blood groups and donor compatibility?

A population of a species invades a new area. Which of the following condition will lead to Adaptive Radiation?

Which option is correct for conduction of nerve impulse along chemical synapse ?
(i) At synapse the membranes of the pre and post- synaptic neurons are separated by a fluid-filled space called synaptic cleft.
(ii) Chemicals called neurotransmitters are involved in the transmission of impulses at these synapses.
(iii) The axon terminals contain vesicles filled with these neurotransmitters.
(iv) When an impulse arrives at the axon terminal, synaptic vesicles release their neurotransmitters in the synaptic cleft.
(v) The released neurotransmitters bind to their specific receptors, present on the pre-synaptic membrane.
(vi) Opens ion channels allowing the entry of ions which can generate a new potential in the post- synaptic neuron.
(vii) The new potential developed is only excitatory.

Formation of segmentation cavity shows

Breast bone is also called

Possible ill-effects of hormonal method for contraceptive are

Sarcolemma is a membrane found over in

In ureotelic animals, urea is formed by

Nerve impulse is