Answer:
a. releasing hormones
Explanation:
The hypothalamus controls the anterior pituitary by means of corticotropin-releasing hormone (CRH). The hormone CRH is encoded by the CRH gene on eighth human chromosome. The anterior pituitary in turn regulates other endocrine glands by means of Adrenocorticotrophic Hormone (ACTH). These actions form part of the Hypothalamic–pituitary–adrenal(HPA) axis which is one of the important neuroendocrine systems in humans.
Answer:
microphone
Explanation:
when you are using a microphone once it stop it done
D. All of these
Reason being, they wouldn't have been made if something hasn't been discovered about them.
Answer:
Explanation:
Following are the Semaphores:
Customers: Counts waiting customers;
Barbers: Number of idle barbers (0 or 1)
mutex: Used for mutual exclusion.
Cutting: Ensures that the barber won’t cut another customer’s hair before the previous customer leaves
Shared data variable:
count_cust: Counts waiting customers. ------------copy of customers. As value of semaphores can’t access directly.
// shared data
semaphore customers = 0; semaphore barbers = 0; semaphore cutting = 0; semaphore mutex = 1;
int count_cust= 0;
void barber() {
while(true) { //shop is always open
wait(customers); //sleep when there are no waiting customers
wait(mutex); //mutex for accessing customers1
count_cust= count_cust-1; //customer left
signal(barbers);
signal(mutex);
cut_hair();
}
}
void customer() {
wait(mutex); //mutex for accessing count_cust
if (count_cust< n) {
count_cust= count_cust+1; //new customer
signal(customers); signal(mutex);
wait(barbers); //wait for available barbers get_haircut();
}
else { //do nothing (leave) when all chairs are used. signal(mutex);
}
}
cut_hair(){ waiting(cutting);
}
get_haircut(){
get hair cut for some time; signal(cutting);
}
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