Touch and pressure are sensed by four types of mechanoreceptors:

Meissner’s corpuscles

Merkel cells

Ruffini corpuscles

Pacinian corpuscles

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#Unit 6. System Physiology – Plant

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#Unit 7. System Physiology – Animal

The thiazide diuretics, inhibit the sodium-chloride co-transporter

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#Unit 4. Cell Communication and Cell Signaling

Sos is a GEF that catalyzes conversion of inactive GDP bound Ras to the active GTP-bound form.

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#Unit 2. Cellular Organization

Myosins have 

Motor head domain

Lever-arm neck domain

Cargo-binding tail domain

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#Unit 6. System Physiology – Plant

The biosynthesis of gibberellins is under strict genetic, developmental, and environmental control, and numerous gibberellin-deficient mutants have been isolated. 

Mendel’s tall/dwarf alleles in peas are a famous example. Such mutants have been useful in elucidating the complex pathways of gibberellin biosynthesis.