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Vagusstoff (literally translated from German as "Vagus Substance") refers to the substance released by stimulation of the vagus nerve which causes a reduction in the heart rate. Discovered in 1921 by physiologist Otto Loewi , vagusstoff was the first confirmation of chemical synaptic transmission and the first neurotransmitter ever discovered.
The film shows graphically the kittens being born without the help of human hands, and then getting nursed and washed by their mother. The kittens grow, and the parent cats roam freely around their owners' apartment (Hammid and Deren). The kittens learn how to walk and begin to get more active, playing with each other and clawing various furniture.
From the eighteenth week of pregnancy (the second and third trimesters), a woman's body produces hormones that stimulate the growth of the milk duct system in the breasts: Progesterone influences the growth in size of alveoli and lobes; high levels of progesterone inhibit lactation before birth. Progesterone levels drop after birth; this ...
The word "kitten" derives from the Middle English word kitoun, which in turn came from the Old French chitoun or cheton. [1] Juvenile big cats are called "cubs" rather than kittens; either term (but usually more commonly "kitten") may be used for the young of smaller wild felids, such as ocelots, caracals, and lynxes.
The female utters a loud yowl as the male pulls out of her because a male cat's penis has a band of about 120–150 backward-pointing penile spines, which are about 1 mm (0.04 in) long; upon withdrawal of the penis, the spines may provide the female with increased sexual stimulation, which acts to induce ovulation.
On Aug. 5, TikTok user @giddykittykat posted a tear-jerking video of a mama cat losing her kittens. The story of the creator and the pregnant feline starts with Biscuit approaching her.
A momma cat helped another cat mourn the loss of her baby in Ohio and people are calling the video “heartbreakingly beautiful.” “It all started during COVID,” Aysha Clever, the cat’s ...
He called the unknown chemical Vagusstoff, naming it after the nerve and the German word for substance. It was later found that this chemical corresponded to acetylcholine . His experiment was iconic because it was the first to demonstrate the endogenous release of a chemical substance that could cause a response in the absence of electrical ...